How to distinguish the high, medium and low pressure of the fan?
Such as 4-72-4.5A 72 is the fan model than the number of revolutions, 72> 60, so we can identify it as a low pressure fan.
Such as: 4-72-4.5A, for the low pressure fan, the maximum air volume of 10562m3 / h, the total pressure of 2550Pa; Y5-47-5C for the pressure fan
The same motor power, and the same speed of the case, the different models of wind turbine and the total pressure is not the same
N = 60-30 for the medium pressure fan; n = 30-5 for the high pressure fan, the specific speed is calculated by the calculation.
High, medium and low pressure fan is its number of revolutions (n) to distinguish, n> 60 for the low pressure fan
